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ea technology

Explore the history and performance of the WhisperGen device in field trials, assessing its impact on cost savings and CO2 emissions reduction. Learn about the Stirling Cycle, trial results, and economic feasibility.

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ea technology

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  1. ea technology DCHP Field Trials Practical Experiences with the WhisperGen Project Manager : Rob Green Presented by Yvonne Dickson

  2. Overview • Introduction to the WhisperGen • History of EA Technology’s involvement • WhisperGen & the Stirling Cycle • Field trials • Performance • Does it save money? • Does it reduce CO2 emissions?

  3. What is the WhisperGen • Floor-mounted boiler replacement • External combustion • Stirling cycle

  4. WhisperGen in the home

  5. Project History • 1999 - studies of commercial viability • 2000 - lab demo of Mk I WhisperGen • 2001 - Mk I • 3 trial houses + test house + lab endurance • 2002 - alpha trial Mk II • 13 houses + lab endurance (4) • 2003 - beta trial Mk III • 15 Chester + 13 Ipswich + lab (Mk II & III) • 2003 / 4 - Mk IV • pre-launch checks - 3 Chester houses

  6. Project History (2) Powergen market launch 2004 • EA Technology training of installers • Monitoring for Carbon Trust & DTI

  7. The Stirling Cycle Piston Gas Flame Regenerator Cooling Circuit Gas Piston

  8. The Stirling Cycle

  9. The Stirling Cycle compression at constant temperature

  10. The Stirling Cycle displacement / regeneration at constant volume

  11. The Stirling Cycle expansion at constant temperature

  12. The Stirling Cycle displacement / regeneration at constant volume

  13. WhisperGen & the Stirling Cycle

  14. WhisperGen • Mk IV current • 0.85 kWe / 6 kW t • 1.2 kWe / 8 kW t • Mk V soon • ~ 1 kWe / 7 kW t to ~ 1 kWe / 15 kW t

  15. The need for field trials Prototype: • Ease of installation • Reliability • Operational experience • Control systems • User acceptability • Performance / Economics • Improvements

  16. The need for field trials (2) Market ready: • Carbon Trust • CO2 emissions • Product accreditation • DTI / electricity suppliers • Electricity metering / settlement

  17. EA Technology Field Trials

  18. What to measure? • Electricity kWh • Generation • House in and out • Heat output • Gas input • Temperatures?

  19. Findings • Range of house types & occupancy patterns • Both affect run hours • Occupant behaviour – big variable • Sales + Accreditation? • User acceptability • Noise • Speed of response

  20. Economics – does it save money? • Well matched (application & engine) • £150 to £200 / year (~ €250 / year) • Need long run hours • Occupancy pattern • House heat loss (need large houses) • Mk V

  21. Carbon Trust Monitoring Trial • Government targets CO2 • Global warming / Kyoto • dCHP high priority • dCHP in context of house • 60 WhisperGen sites to be monitored • 40 Powergen • 20 Northern Ireland

  22. Carbon Trust Method Telemetry system GSM Logger / receiver Temperatures Pulses (Gas, electric, heat)

  23. Does it save CO2? • Comparing against? • Boiler (B rated 86%+, A rated ~93%) • Central power station • If dCHP overall efficiency >= boiler efficiency • Obviously reduces CO2 emissions • If dCHP overall efficiency < boiler efficiency • Not so clear cut

  24. Conclusions • WhisperGen is commercially available • Stirling Cycle, External Combustion • Field trials are essential to prove: • Customer acceptability, reliability, use patterns export (utilisation) etc. etc. • Occupant behaviour has a big effect • Mk V should expand market for WhisperGen • Saves CO2? rob.green@eatechnology.com

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